PHOTOS BY GETTY IMAGES

Tool

Ticket prices: $66.66
Tour dates: May 15-Aug. 13
Last album: 10,000 Days (Volcano Records), May, 2006

Tool, a heavy metal group that was formed in Los Angeles in 1990, is known for the intense visual and auditory stimulation at their shows. A strange factoid about the group: They keep an ongoing reading list for their fans.

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